What is the difference between char array and char pointer in C?

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I am trying to understand pointers in C but I am currently confused with the following:

  • char *p = "hello"

    This is a char pointer pointing at the character array, starting at h.

  • char p[] = "hello"

    This is an array that stores hello.

What is the difference when I pass both these variables into this function?

void printSomething(char *p)
{
    printf("p: %s",p);
}

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